Ball-bearing.



UNITED jsfrarns Parana" carica,

svDN GUsrAnwrNGoUisr, or eofrrnNBonG, SWEDEN, AND nRHAnD JUNGHANsOrcANNsrArr-s'rufrrennr, GERMANY; sArD WINeoUrsfr AssreNon To ,Anmie-DOLAGET svENsKA KULLAGERDABRIKEN, or GoTrnNBone, SWEDEN, A'JoINT.

' STOCK COMPANY OF SWEDEN.

BALL-BEARIN Gr.'

Specification of Letters Patent. Patented Jan. 4, 1916.

Application led January, 1915. Serial No. 755,.

TQ all whom' t may concern:

Be it known that we, SVEN GUSTAF WING- Quis'r, a citizen of the Kingdomo f Sweden, residing at Gottenborg, Sweden, and ERHARD JUNGHANS, acitizen of the Empire of .Ger-

many, residing at Cannstatt-Stuttgart, Gerthe kind in which the ballsare filled in between bearing rings.; provided with balltracks,` throughside 'lill-passages, without necessitating any deformation of the balls,

or the bearing-rings, such ldeformations being scarcely practicablewithout damaging the balls, orthe bearing rings. While in ball bearingsof this kind heretofore used the balls tend to escape through thell-pa'ssage when passing the same, this inconvenience is obviatedaccording to one feature of the present invention, without the use ofany shoulder rendering the filling in of the balls diliicult, vby soforming the flll-passage, I which extends to theouter side face of thebearing-ring, that it slopes outwardly to- Vwardthe axls ofthe bearing.'On account` thereof, the-balls under 'the action' of cen-v trifugalforce, tend to remain' on the bottom of the ball-track in the outerbearing-ring where the balls are at the greatest distance from theaxisg-Of the ballA bearing. Prefer-4 ably the lill-passage isconstituted by recesses in the side of each bearing-ring s o formed thattheir junction with the ball-tracks does notfinterfere with, ybutmaintains the continuity of thetbottoms of the latter.

1A further feature of the inventionrelates to a process of grindingbearing-rings provided with recesses to constitute lill-passages formedas above described, wherein; the balltrack is first ground by swingingthe grinding-wheel across thetrack aboutthe center ofcurvature ofthecross-section of the track, andthe recess is ground by swinging the samegrinding wheel outward about the'center ofcurvature ofthe recess. v

A suitable form ofhis invention lis illustrated in the accompanyingdrawing showing a sectional view of av ball bearing," the 'section beingtaken through the ll'passage.

The outer bearing-ring a and the inner bearing-ring are each providedlwith the usual groove the bottom of which constitutes la' ball-trackhaving in cross section a greater radius of curvature than the-balls.Art one point of. the periphery recesses o and d are formed in one edgeat least of each track and constitute a lill-passage curving from thebottom of the track in the direction toward the axis of the bearing,preferably along an arc, the center of which is located in the Lplane'thro'ugh the centers of the balls. In

this way the continuity of the bottoms of the.

= ing ring b is so suited to the shape of the recess d of the outerbearingrin a that the balls may be introduced through the passage formedby the two recesses without the necessity of exercising on the balls agreaterx pressure than that `to which they are sub: vjected in thebearing, when mounted.

The recess of a given bearing-.ring maybe suitabIyiniShed, after theltrack and there- `cess'have been ground roughly, by the finishingtrack-grinding wheel, which after being swung' about one centerv infinishing the track, 'may .be swung laterally to inish the recess aboutanother center, namely the center off'curvature of therecess. i'

Theifinvention may," although with less ad vantage be carried out'inlsuch manner 'that thezlateral recessv of the outer bearing ring isomitted'. The innerbearing ring onlyl is in this case'provided with arecesswhichcurves' sharply inward, forming in conjunctionwardly'towardthe axis of the bearing.

Having thus described our invention, what weclaim as nel'w'and'desire'tosecure by Let- 1. A. ball 'bearing- :having bearing rings' formed withgrooves the bottoms of.' which constitute ball-tracks andV recesses in.lthe bearing rings forming' a side till-passage,

f each of said recesses slopingoutwardly from the side oftheballtrack4toward the axis of rotatimv ofthe'bearing, the` bottomA ofeach of said recesses extending to the said bottom of the ball-trackgroove and being connected` thereto so as to maintain the continuity of.

the bottom Iofthe latter, substantially as and for the purpose setforth'. l

`2. A ball bearing having bearing rings formed with grooves the bottomsof which constitute bail-tracks and recesses in the bearing ringsforming a side i11-passage each of said recesses sloping outwardly fromthe sideof the ball-track toward the axis of 'rotation of the bearing,the bottom of each `of said recesses extending to the saidl bottom olflthe ball-track groove and being conneoted thereto so as to maintain thecontinuity'of the bottom of the latter, the Curvature of thefill-passage being slighter than Copies of this patent may be obtainedfor ve cents each, by addressing the Commissioner of Patents.-

the said curvature of the bali-tracks, substantially as and for thepurpose set forth.

In testimony that We claim the foregoing as our invention, we havesigned our names in presence of two subscribing Witnesses.

SVEN GUSTAF yWINGrQUIST. ERI-IARD JUNGHANS.

itnesses to the signature of M1'. S. G. Vin'gquist: y

J USTA RICU, K. E. WIBERG. v Witnesses to the signature of Mr. E.Junghans:

FRIDA KLAIBER, ERNEST -EYERMANX Washington, D. C.

